Converting PNG to WebP is one of the most effective image optimization techniques for the web. WebP provides 25-35% smaller files than PNG while maintaining equivalent visual quality, including full support for transparency.
WebP uses more efficient compression algorithms than PNG's DEFLATE, particularly for images with many colors. For screenshots, graphics, and UI elements that are commonly saved as PNG, the savings can be dramatic without any quality loss in lossless mode.
With ImgTools, upload your PNG image, switch to the Convert tab, and select WebP as the output format. The conversion happens instantly in your browser. For lossless conversion (perfect quality), WebP produces smaller files. For lossy conversion with quality adjustment, the savings are even greater.
WebP browser support in 2026 is excellent at over 97% coverage including Chrome, Firefox, Safari, Edge, and Opera. For the remaining browsers, use the HTML picture element to provide a PNG fallback.
All conversion happens locally in your browser. Your images are never uploaded to any server, ensuring complete privacy.